13-03-2011, 02:21 PM
Transformer Basics
An electrical device that transfers energy from one circuit to another purely by magnetic inductive coupling.
Review of transformer losses
No load Loss (Excitation Loss) includes the hysteresis loss and eddy current loss.
excitation loss: energy lost by reversing the magnetic field in the core by the alternating AC.
mechanical loss: bearing friction,brush friction and windage loss
Load Loss (Impedance Loss)
Stray loss: It includes distortion of air-gap flux and also due to the due to non uniform distribution of conductor current.
I^2R loss:
Eddy current loss:
The eddy current produce a magnetic field that interacts with the primary magnetic field of the coil.
CHALLENGES FACED
Increased Transformer Efficiency
Reduced humming loss
fabrication ease
economy
get the report here:
http://scribddoc/33942224/My-final-year-project-on-transformer-loss-reduction
